Official NHA Assessment

Race 6: DURBANVILLE CUP (Listed) (For All Horses)

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Line Horse
Silver Host
Reference for assessment
Exact Matches
0 / 10
Calculated = Official
Close Matches
5 / 10
Within 2 points
Significant Diffs
4 / 10
More than 5 points
Detailed Assessment
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Pos  Horse                Age  Weight  Fin  Lengths  WFA   Pre   Race Rating  New   Adj  
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1    Thefutureisbright    3    53.0    1    0.00     5.0   95    81           81    -14
2    Master Redoute       3    54.5    2    0.40     5.0   99    90           90    -9
3    Flower Of Saigon     4    50.0    3    1.65     2.0   93    86           86    -7
4    Silver Host          6    62.0    4    1.75     0.0   113   113          113   +0
5    Han Solo             5    57.5    5    1.95     0.0   104   104          104   +0
6    Arctic Drift         5    54.5    6    2.25     0.0   97    98           98    +1
7    Senso Unico          3    60.5    7    2.30     5.0   111   100          101   -10
8    Rex Union            4    54.5    8    2.60     2.0   99    94           94    -5
9    Super Silvano        5    59.0    9    4.35     0.0   106   104          104   -2
10   Chewbaca             5    51.5    10   6.60     0.0   92    88           88    -4
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Horse-by-Horse Comparison

Pos Horse Pre-Rating Official New Calculated Discrepancy WFA (kg) Line Horse Calculation
1 Thefutureisbright 95 94 81 +13 5.0 -
2 Master Redoute 99 113 90 +23 5.0 -
3 Flower Of Saigon 93 102 86 +16 2.0 -
4 Silver Host Line 113 111 113 -2 0.0
5 Han Solo 104 102 104 -2 0.0 -
6 Arctic Drift 97 97 98 -1 0.0 -
7 Senso Unico 111 112 101 +11 5.0 -
8 Rex Union 99 97 94 +3 2.0 -
9 Super Silvano 106 103 104 -1 0.0 -
10 Chewbaca 92 87 88 -1 0.0 -
Assessment Methodology
Calculation Steps:
  1. Identify Line Horse - consistent performer used as reference
  2. Calculate WFA Allowance based on age, distance, and month
  3. Apply Drag Adjustment for beaten margin
  4. Calculate Actual Weight Performance:
    Weight - Drag - WFA
  5. Compare to Line Horse to determine race rating
  6. Apply special rules (maiden caps, layoff allowance)
Key Formulas:
  • Drag Effect: Varies by distance (see Benchmarks page)
  • 1 length ≈ 1kg at 1 mile (1600m)
  • WFA Scale: Based on Admiral Rous's 1855 table
  • Rating Points: 1kg = 2 rating points